Run LXC in RAM completely

lxc_ram.start.sh

#!/bin/bash

machinename="ubuntu"

# Help menu
print_help() {
cat <<-HELP

First, copy both .sh files to the LXC machine folder, next edit and configure the machine name in each.

To run the machine in ram you need edit the config file. Replace lxc.rootfs.path by /var/lib/lxc/{machine name}/ramdisk

Next run this script again how root.

To stop the machine and free the memory use: lxc_ram.stop.sh. To reset the machine run lxc_ram.start.sh again.

Be careful that you have enough free memory.

HELP
exit 0
}

if [ $(id -u) != 0 ]; then
  printf "**************************************\n"
  printf "* Error: You must run this with sudo or root*\n"
  printf "**************************************\n"
  print_help
  exit 1
fi

# printf colors.
red=$'\e[1;31m'
grn=$'\e[1;32m'
yel=$'\e[1;33m'
blu=$'\e[1;34m'
mag=$'\e[1;35m'
cyn=$'\e[1;36m'
end=$'\e[0m'

mkdir ./ramdisk

./lxc_ram.stop.sh

printf "Mount the RAMdisk"
mount -t tmpfs -o size=5G,nr_inodes=2032748 discoram /var/lib/lxc/${machinename}/ramdisk
printf "%-10s [${grn}Ok${end}]\n" "$txt"
printf "Coping rootfs/"
cp -ar /var/lib/lxc/${machinename}/rootfs/. /var/lib/lxc/${machinename}/ramdisk
printf "%-10s [${grn}Ok${end}]\n" "$txt"
# Copy source code, or other external files, here.

printf "%s\n" "Starting ${machinename} LXC. ${blu}Stop it with lxc_ram.stop.sh${end}"
lxc-start -d -n ${machinename}

printf "%s\n" "${yel}*******************************************${end}"
printf "%s\n" "${yel}** REMEMBER: All changes will be lost !! **${end}"
printf "%s\n" "${yel}*******************************************${end}"

lxc_ram.stop.sh

#!/bin/bash

machinename="ubuntu"

# Help menu
print_help() {
cat <<-HELP
TODO: Help
HELP
exit 0
}

if [ $(id -u) != 0 ]; then
  printf "**************************************\n"
  printf "* Error: You must run this with sudo or root*\n"
  printf "**************************************\n"
  print_help
  exit 1
fi

# printf colors.
red=$'\e[1;31m'
grn=$'\e[1;32m'
yel=$'\e[1;33m'
blu=$'\e[1;34m'
mag=$'\e[1;35m'
cyn=$'\e[1;36m'
end=$'\e[0m'

printf "Stoping ${machinename}"
lxc-stop -n ${machinename}
printf "%-10s [${grn}Ok${end}]\n" "$txt"

printf "Clean RAMdisk"
umount /var/lib/lxc/${machinename}/ramdisk
printf "%-10s [${grn}Ok${end}]\n" "$txt"